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632f494 |
--- util-linux-2.13-pre6/mount/fstab.c.twiceloop 2006-01-03 18:35:05.000000000 +0100
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632f494 |
+++ util-linux-2.13-pre6/mount/fstab.c 2006-01-03 18:37:44.000000000 +0100
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632f494 |
@@ -254,6 +254,27 @@
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632f494 |
return (ct == 1);
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632f494 |
}
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632f494 |
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632f494 |
+/*
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632f494 |
+ * Given the loop file LOOPFILE, and the mount point DIR, check that
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632f494 |
+ * same file is already mounted on same directory
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632f494 |
+ *
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632f494 |
+ * Don't forget there's
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632f494 |
+ * /path/loopfile /path/dir loop=/dev/loop0
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632f494 |
+ * in mtab for loop devices.
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632f494 |
+ */
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632f494 |
+int
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632f494 |
+is_mounted_same_loopfile(const char *loopfile, const char *dir) {
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632f494 |
+ struct mntentchn *mc, *mc0;
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632f494 |
+ int ct = 0;
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632f494 |
+
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632f494 |
+ mc0 = mtab_head();
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632f494 |
+ for (mc = mc0->prev; mc && mc != mc0; mc = mc->prev)
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632f494 |
+ if (streq(mc->m.mnt_fsname, loopfile) &&
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632f494 |
+ streq(mc->m.mnt_dir, dir))
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632f494 |
+ ct++;
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632f494 |
+ return (ct == 1);
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632f494 |
+}
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632f494 |
+
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632f494 |
/* Given the name FILE, try to find the option "loop=FILE" in mtab. */
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632f494 |
struct mntentchn *
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632f494 |
getmntoptfile (const char *file) {
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632f494 |
--- util-linux-2.13-pre6/mount/mount.c.twiceloop 2006-01-03 18:35:06.000000000 +0100
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632f494 |
+++ util-linux-2.13-pre6/mount/mount.c 2006-01-03 18:37:44.000000000 +0100
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632f494 |
@@ -671,7 +671,7 @@
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632f494 |
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632f494 |
static int
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632f494 |
loop_check(const char **spec, const char **type, int *flags,
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632f494 |
- int *loop, const char **loopdev, const char **loopfile) {
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632f494 |
+ int *loop, const char **loopdev, const char **loopfile, const char *dir) {
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632f494 |
int looptype;
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632f494 |
unsigned long long offset;
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632f494 |
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632f494 |
@@ -709,6 +709,11 @@
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632f494 |
} else {
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632f494 |
int loopro = (*flags & MS_RDONLY);
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632f494 |
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632f494 |
+ if (is_mounted_same_loopfile(*loopfile, dir)) {
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632f494 |
+ error(_("mount: %s already mounted on %s"), *loopfile, dir);
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632f494 |
+ return EX_FAIL;
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632f494 |
+ }
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632f494 |
+
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632f494 |
if (!*loopdev || !**loopdev)
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632f494 |
*loopdev = find_unused_loop_device();
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632f494 |
if (!*loopdev)
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632f494 |
@@ -856,7 +861,7 @@
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632f494 |
* stale assignments of files to loop devices. Nasty when used for
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632f494 |
* encryption.
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632f494 |
*/
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632f494 |
- res = loop_check(&spec, &types, &flags, &loop, &loopdev, &loopfile);
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632f494 |
+ res = loop_check(&spec, &types, &flags, &loop, &loopdev, &loopfile, node);
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632f494 |
if (res)
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632f494 |
goto out;
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632f494 |
}
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